"now home to many local rugby and football teams. Deep Navigation Colliery Deep Navigation Colliery was a coal mine in South Wales, that operated from 1872 until 1991. Located next to the co-developed village of Treharris in the borough of Merthyr Tydfil, on development it was the deepest coalmine in South Wales Coalfield by some . Producing the highest quality steam coal, it powered both the Cunard passenger steamers RMS ""Mauretania"" and RMS ""Lusitania"" in their successful attempts at the Blue Riband prize for the most rapid Atlantic Ocean passage. The mine is also thought to have been one of"
"has a volume of . The North Atlantic covers (11.5%) and the South Atlantic (11.1%). The average depth is and the maximum depth, the Milwaukee Deep in the Puerto Rico Trench, is . The bathymetry of the Atlantic is dominated by a submarine mountain range called the Mid-Atlantic Ridge (MAR). It runs from 87°N or south of the North Pole to the subantarctic Bouvet Island at 42°S. The MAR divides the Atlantic longitudinally into two halves, in each of which a series of basins are delimited by secondary, transverse ridges. The MAR reaches above along most of its length, but"
"largest and deepest trench in the Atlantic. The trench is long and about wide. At its deepest point, named Milwaukee Depth, it is 8,380 m (27,493 ft) deep, or about . As an unincorporated territory of the United States, Puerto Rico does not have any first-order administrative divisions as defined by the U.S. Government, but there are 78 municipalities at the second level. Municipalities are further subdivided into ""barrios"", and those into sectors. Each municipality has a mayor and a municipal legislature elected for a 4-year term. The first municipality (previously called ""town"") of Puerto Rico, San Juan, was founded"
"Litke Deep Litke Deep () is an oceanic trench in the Arctic Ocean. It is the deepest known point in the Arctic Ocean. It is the 20th deepest oceanic trench in the world. The Litke Deep is located in the southwestern part of the Eurasian Basin south of the underwater ridge Gakkel Ridge roughly 350 kilometers northeast of Svalbard and roughly 220 km north of the island of Nordaustlandet. The deepest part is at 5,449 metres (17,881 feet) under sea level. The average depth in the Arctic Ocean is about 1,000 metres and more than 60 % is less than"
"boundary between the Caribbean and North American plates is the Puerto Rico Trench, the largest and deepest trench in the Atlantic. The trench is 1,090 miles (1,754 km) long and about 60 miles (97 km) wide. At its deepest point (named Milwaukee Depth), it is deep. At this trench the North American plate is being subducted by the Caribbean plate. This subduction zone is responsible for the volcanism of the West Indies to the southeast of Puerto Rico. A major transform fault extends from the Puerto Rico trench along the northern coast of Puerto Rico and on through the Cayman"
"Challenger Deep The Challenger Deep is the deepest known point in the Earth's seabed hydrosphere, with a depth of by direct measurement from submersibles, and slightly more by sonar bathymetry. It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group. The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is an unusually deep feature in the ocean floor. The Challenger Deep's bottom is about long and wide, with gently sloping sides. The closest land to the Challenger Deep is"
"Sigsbee Deep The Sigsbee Deep (Mexico basin in the U. S. Board on Geographic Names Advisory Committee on Undersea Features (ACUF) Gazetteer), is a roughly triangular basin that is the deepest part of the Gulf of Mexico named for Commander Charles Dwight Sigsbee, USN, Assistant U. S. Coast and Geodetic Survey, commanding officer of the USC&GS George S. Blake which discovered the feature during its mapping of the Gulf of Mexico. As described below there is some confusion of names that apply to the basin or a particular point in the basin with both being found in technical and popular"
"Milwaukee, Wisconsin. J. Val Klump Jeffrey Val Klump is an American limnologist. He was the first person to reach the deepest spot in Lake Superior, a depth of 1333 feet (733 feet below sea level), the second lowest point in the United States after Iliamna Lake, on July 30, 1985 while aboard the R/V Seward Johnson with the Johnson Sea Link-II submersible. Klump was also the first person to reach to the deepest point in Lake Michigan as part of the same expedition. He is currently a professor and dean at the School of Freshwater Sciences at the University of"
"ocean off the coast of the northwestern United States. According to one of the researchers, ""You can find microbes everywherethey're extremely adaptable to conditions, and survive wherever they are."" Challenger Deep The Challenger Deep is the deepest known point in the Earth's seabed hydrosphere, with a depth of by direct measurement from submersibles, and slightly more by sonar bathymetry. It is in the Pacific Ocean, at the southern end of the Mariana Trench near the Mariana Islands group. The Challenger Deep is a relatively small slot-shaped depression in the bottom of a considerably larger crescent-shaped oceanic trench, which itself is"
"1970s. In 2000, there existed only a handful of discovered and documented shipwrecks in the water off the southwest coast of Michigan. Today, many of these have provided a source of sport diving opportunities. However, there still is a wealth of historical information awaiting discovery. The waters off West Michigan are not sheltered with harbors like so many other areas in Michigan. Prevailing west and northwest winds have scoured out the bottom, creating one of the deepest areas in the lake. While just across the lake, off Chicago and Milwaukee, the water is as shallow as 100 feet ten miles"
"both the Water Hemisphere and the Western Hemisphere are in the Pacific Ocean. The equator subdivides it into the North Pacific Ocean and South Pacific Ocean, with two exceptions: the Galápagos and Gilbert Islands, while straddling the equator, are deemed wholly within the South Pacific. Its mean depth is . The Mariana Trench in the western North Pacific is the deepest point in the world, reaching a depth of . The western Pacific has many peripheral seas. Though the peoples of Asia and Oceania have traveled the Pacific Ocean since prehistoric times, the eastern Pacific was first sighted by Europeans"
"Sirena Deep The Sirena Deep was discovered in 1997 by a team of scientists from Hawaii. Its depth (10,732 metres) is thought to be second or third only to the Challenger Deep and possibly Horizon Deep, currently the deepest known places in the ocean. It lies along the Mariana Trench, 200 kilometers to the east of the Challenger Deep and 145 km south of Guam. The Sirena Deep was most probably formed, not through transform fault motion as previously thought, but through a north-south convergence of the Caroline plate and the Pacific plate, in which the Caroline plate is subducting."
"200 metres deep. The Eurasian Basin stretches from northeastern part of Greenland past the Svalbard archipelago, Franz Josef Land and Severnaya Zemlya to the Taymyr Peninsula. Sometimes the Molloy Deep is mentioned as the deepest point in the Arctic Ocean, this deep however lies in the Fram Strait in the Greenland Sea. The Litke Deep was located in 1955 by the russian icebreaker ”Fyodor Litke” expedition. It is named after russian explorer Fyodor Petrovich Litke. Litke Deep Litke Deep () is an oceanic trench in the Arctic Ocean. It is the deepest known point in the Arctic Ocean. It is"
"Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south and is bounded by Asia and Australia in the west and the Americas in the east. At in area (as defined with an Antarctic southern border), this largest division of the World Ocean—and, in turn, the hydrosphere—covers about 46% of Earth's water surface and about one-third of its total surface area, making it larger than all of Earth's land area combined. The centers of"
"Zhemchug Canyon Zhemchug Canyon is an underwater canyon located in the middle of the Bering Sea. This submarine canyon is the deepest and is tied for widest canyon in the ocean. It has a vertical relief of dropping from the shallow shelf of the Bering Sea to the depths of the Aleutian Basin. Zhemchug Canyon is deeper than the Grand Canyon which is deep. It has two main branches, each larger than typical continental margin canyons such as the Monterey Canyon. What makes the Zhemchug Canyon the world's largest is not only its great depth, but its immense cross-sectional and"
"Milwaukee Milwaukee (, ) is the largest city in the state of Wisconsin and the fifth-largest city in the Midwestern United States. The seat of the eponymous county, it is on Lake Michigan's western shore. Ranked by estimated 2014 population, Milwaukee was the 31st largest city in the United States. The city's estimated population in 2017 was 595,351. Milwaukee is the main cultural and economic center of the Milwaukee metropolitan area. It is also part of the larger Milwaukee-Racine-Waukesha combined statistical area, which had an estimated population of 2,026,243 in the 2010 census. Milwaukee is the second-most densely populated metropolitan"
"It is the larger half of Lake Michigan–Huron, which is the largest body of fresh water in the world by surface area. It is long by wide with a shoreline long. The lake's average depth is 46 fathoms 3 feet (279 ft; 85 m), while its greatest depth is 153 fathoms 5 feet (923 ft; 281 m). It contains a volume of 1,180 cubic miles (4,918 km³) of water. Green Bay in the northwest is its largest bay. Grand Traverse Bay in its northeast is another large bay. Lake Michigan's deepest region, which lies in its northern-half, is called Chippewa"
"the deepest surveyed spot in the world's oceans, and is located in the Mariana Trench, southwest of Guam. From February 16, 1960, to May 10, 1960, the submarine , under the command of Captain Edward L. Beach, Jr., made the first submerged circumnavigation of the world. ""Triton"" observed and photographed Guam extensively through her periscope during this mission, without being detected by the U.S. Navy on Guam. In the film, ""Seaview"" fires a missile from a position northwest of Guam to extinguish the ""skyfire."" At the time that ""Voyage to the Bottom of the Sea"" was made, the Van Allen"
"the deepest point on the planet. The Philippine Sea has the Philippines and Taiwan to the west, Japan to the north, the Marianas to the east and Palau to the south. Adjacent seas include the Celebes Sea which is separated by Mindanao and smaller islands to the south, the South China Sea which is separated by Philippines, and the East China Sea which is separated by the Ryukyu Islands. The International Hydrographic Organization defines the Philippine Sea as ""that area of the North Pacific Ocean off the Eastern coasts of the Philippine Islands"", bounded as follows: ""On the west."" By"
"Deepwater Horizon Deepwater Horizon was an ultra-deepwater, dynamically positioned, semi-submersible offshore drilling rig owned by Transocean. Built in 2001 in South Korea by Hyundai Heavy Industries, the rig was commissioned by R&B Falcon (a later asset of Transocean), registered in Majuro, and leased to BP from 2001 until September 2013. In September 2009, the rig drilled the deepest oil well in history at a vertical depth of and measured depth of in the Tiber Oil Field at Keathley Canyon block 102, approximately southeast of Houston, in of water. On 20 April 2010, while drilling at the Macondo Prospect, an uncontrollable"
"deepest continental point on Earth — is a saline wetland in the desert, on the northwestern shore of the Dead Sea, nourished by a spring of brackish water. Fish in this special habitat evolved isolated from fish populating other habitats. On a first study of the southeast Mediterranean Basin, published in 1947 jointly with Prof. Georg Haas, they observed fish of Indo-Pacific origin. Later, Steinitz published dozens of papers on fish, the fauna and the ecology of the southeast Mediterranean Sea and the Red Sea. In 1967, together with Dr. William Aron from the Smithsonian Institution in Washington DC, Steinitz"
"Mariana Trench The Mariana Trench or Marianas Trench is located in the western Pacific Ocean approximately east of the Mariana Islands, and has the deepest natural point in the world. It is a crescent-shaped trough in the Earth's crust averaging about long and wide. The maximum known depth is (± ) at the southern end of a small slot-shaped valley in its floor known as the Challenger Deep. However, some unrepeated measurements place the deepest portion at . For comparison: if Mount Everest were dropped into the trench at this point, its peak would still be over under water. At"
"have occurred. ""HROV Nereus"" was thought to have imploded at a depth of 9,990 meters while exploring the Kermadec Trench in 2014. The first manned exploration to reach Challenger Deep, the deepest known part of the ocean located in the Mariana Trench, was accomplished in 1960 by Jacques Piccard and Don Walsh. They reached a maximum depth of 10,911 meters in the bathyscaphe ""Trieste"". James Cameron also reached the bottom of Mariana Trench in March 2012 using the ""Deepsea Challenger"". The descent of the ""Deepsea Challenger"" was unable to break the deepest dive record set by Piccard and Walsh by"
"Lake Crescent Lake Crescent is a deep lake located entirely within Olympic National Park in Clallam County, Washington, United States, approximately west of Port Angeles, Washington on U.S. Route 101 and nearby to the small community of Piedmont. At an official maximum depth of , also the maximum depth of the depth sounder used to find that depth (see depth section), it is officially the second deepest lake in Washington. Unofficial depth measurements of more than have been rumored in the region for years, although this figure has recently been proven false after a lake-wide bathymetric survey was performed from"
"Bathyscaphe Trieste Trieste is a Swiss-designed, Italian-built deep-diving research bathyscaphe, which with its crew of two reached a record maximum depth of about , in the deepest known part of the Earth's oceans, the Challenger Deep, in the Mariana Trench near Guam in the Pacific. On 23 January 1960, Jacques Piccard (son of the boat's designer Auguste Piccard) and US Navy Lieutenant Don Walsh achieved the goal of Project Nekton. ""Trieste"" was the first manned vessel to have reached the bottom of the Challenger Deep. ""Trieste"" consisted of a float chamber filled with gasoline (petrol) for buoyancy, with a separate"
"in the Atlantic, is located about north of Puerto Rico at the boundary between the Caribbean and North American plates. It is long. At its deepest point, named the Milwaukee Deep, it is almost deep. The climate of Puerto Rico in the Köppen climate classification is tropical rainforest. Temperatures are warm to hot year round, averaging near 85 °F (29 °C) in lower elevations and 70 °F (21 °C) in the mountains. Easterly trade winds pass across the island year round. Puerto Rico has a rainy season which stretches from April into November. The mountains of the Cordillera Central are"
"of the Tonga Trench, the Horizon Deep at , is deep, making it the deepest point in the Southern Hemisphere and the second deepest on Earth after the Challenger Deep in the Mariana Trench. It is named for the research vessel ""Horizon"" of the Scripps Institution of Oceanography, the crew of which found the deep in December 1952. As one of the deepest hadal trenches, the sediments of the Horizon Deep harbours a community of roundworms. A 2016 study found that the abundance of individuals in this community is six times greater than it is at a site on the"
"McKinlay at Wakulla Springs. Karst Underwater Research Karst Underwater Research (KUR) is a registered 501(c)(3) non-profit organization that specializes in the research and documentation of karst aquifers and their corresponding surface features. KUR members perform a variety of scientific processes, including mapping and cartography, radio location, photography, videography, YSI water analysis and sampling. In 2007, KUR found that Weeki Wachee Springs is the deepest known naturally formed spring in the United States at a depth of . From May 22 until August 30, 2007, the discharge at Weeki Wachee Spring dropped to a level that allowed for cave divers to"
"basin of , to the east of the Continental Divide of the Americas, while it drains approximately from the Rio Grande and from the Yucatan Peninsula. American Mediterranean Sea The American Mediterranean Sea is the combined waterbody of the Caribbean Sea and the Gulf of Mexico. The American Mediterranean has a surface area of 4.319 million km and an average depth of . Its basins include those of the southern Caribbean: The Venezuelan, the two Colombians, the Magdalena River and the Gulf of Darién; and the Yucatan Basin. It also contains the Mexican and the Mississippi Basin, both of the"
"the ACUF Mexico basin with ""Sigsbee deep"" as an alternate name is given in the NGA database as 25° N 92° W. There are other features with BGN approved names in the region in recognition of this pioneer in deep ocean sounding and commander of the first true bathymetric survey of the Gulf of Mexico conducted while commanding USC&GS ""George S. Blake"": Sigsbee Deep The Sigsbee Deep (Mexico basin in the U. S. Board on Geographic Names Advisory Committee on Undersea Features (ACUF) Gazetteer), is a roughly triangular basin that is the deepest part of the Gulf of Mexico named"
"Lake Minnetonka was formed approximately 10,000 years ago as the Laurentide Ice Sheet receded northward. The lake is a collection of kettle lakes connected by channels and marshlands which, along with 18 islands, comprise its irregular shape and of shoreline. Lake Minnetonka is divided into two halves, the Upper Lake in the west and the Lower Lake in the east, which reflect the easterly flow of water in the lake's watershed. The deepest point of Lake Minnetonka is in Crystal Bay. The average depth of the lake is approximately . With a surface area of , Lake Minnetonka is the"
"men encased in form-fitting bubbles. For the full test run the Triton will descend into the Milwaukee Deep, north of Puerto Rico. Because the United States Navy has taken an interest in Triton and has partly funded her development, the commanding officer on the test run will be Admiral Robert Haller. Dexter, the president's science advisor, and Senator Kenney are to accompany the crew as observers. Another of the observers going along is Sid Upjohn, a reporter. As they descend they find that they are losing control of the boat and, further, that they are being rammed by a whale."
"and other sponges have been identified during trawl surveys in the canyon. It is where the opilio (snow) crab and bairdi crab can be found. Zhemchug Canyon Zhemchug Canyon is an underwater canyon located in the middle of the Bering Sea. This submarine canyon is the deepest and is tied for widest canyon in the ocean. It has a vertical relief of dropping from the shallow shelf of the Bering Sea to the depths of the Aleutian Basin. Zhemchug Canyon is deeper than the Grand Canyon which is deep. It has two main branches, each larger than typical continental margin"